Forceps assembly for removing cellular tissue from the body cavities

ABSTRACT

A forceps assembly has a forceps holder attached to the end of a flexible tube and a pair of scissors opened and closed by a wire running through said flexible tube, at least one of the opposing blades of the scissors having a clamp member for clamping a piece of cellular tissue to be scissored between the clamp member and the other of the scissor blades.

ited States Patent [191 [111 3, Korniya Oct. 8, 1974 FORCEPS ASSEMBLYFOR REMOVING 2,434,550 1 /1948 Daniel 43/29 CELLULAR TISSUE FROM T BODY2,955,592 10/1960 MacLean 128/2 B CAVITIES 2,994,321 8/1961 Tischler128/2 B 3,353,531 11/1967 Armao 128/2 B [75] Inventor; Osamu Komiya,Tokyo, Japan 3,391,690 7/1968 Armao 128/2 B 3,404,677 10/1968 Springer128/2 B [73] Assigneez Olympic Optical Co., Ltd., Tokyo,

Japan FOREIGN PATENTS OR APPLICATIONS Filed: Nov. 21, Germany B Appl'308,467 Primary Examiner-Aldrich F. Medbery V Attorney, Agent, orFirm-Flynn & Frishauf [30] Foreign Application Priority Data Nov. 24,1971 Japan 46-110082 [57] ABSTRACT 52 us. Cl. 128/2 B, 128/318 A forcepsassembly has a fmeps atached 51 im. C1 -A6lb 10/00 the end a flexlbletube and a scssms pened I and closed by a wire running through saidflexible [58] Flew of Search 28/2 3 tube, at least one of the opposingblades of the scissors having a clamp member for clamping a piece ofcellut d t t l References Cited lar tissue 0 be scissore be ween he 0amp member and the other of the scissor blades. UNITED STATES PATENTS487,068 11/1892 Drinkwater et a1 ..12s/307 awing Figures 2 I I 7 L J 5(O '1 "I H 1 FORCEPS ASSEMBLY FOR REMOVING CELLULAR TISSUE FROM THE BODYCAVITIES The present invention relates to a forceps assembly in use forremoving cellular tissue from the inner walls of the body cavities.

In recent years, .pieces of tissues are extracted from various bodywalls for medical examination. Practically, a forceps is insertedtogether with an endoscope deep into the body cavity and cuts andremoves off the body walls tissue pieces necessary for examination, for

instance, polyps. The forceps now in practical use are the so-calledcap-forceps, each comprised of a pair of cups which are swung open andput together. The cupforceps, however, tear cellular tissue bit by bitaway from the body walls and inevitably make the tissue removaldifficult and time-consuming.

The object of the present invention is to provide a forceps which cancut and clamp a relatively large piece of cellular tissue.

SUMMARY OF THE INVENTION The forceps assembly according to the presentinvention comprises a forceps holder attached to the end of a flexibletube, a pair of scissors held by said forceps holder and constituted bya pair of blades opened and closed by a wire running through saidflexible tube, and at least one clamp member protruding from the back ofone of said paired blades for clamping a piece of cut off cellulartissue between the clamp member and the other of the pair of scissorblades.

The present invention can be more fully understood from the followingdetailed description when taken in connection with the accompanyingdrawing, in which:

FIG. 1 is a side sectional view of one embodiment of the presentinvention;

FIG. 2 is a front sectional view of the embodiment of FIG. 1 with itsscissors in the opened state; and

FIG. 3 is a front sectional view of the embodiment of FIG. 1 with itsscissors in the closed state.

The structure and function of the forceps assembly according to thepresent invention will be more fully understood with reference to FIGS.1, 2 and 3.

A flexible tube 11 is made of a spiraled plastic wire or tape coveredwith a plastic layer or layers, and has a wire 22 running therethrough.A forceps holder 12 is attached to said flexible tube 11. Fixed toforceps holder 12 are a pair of support plates 13 in parallel to eachother, between the front portions of which a pair of scissors 17 made ofopposing blades 15 and 16 are pivotally disposed by a pin 14. Aconnector 18 is so disposed in forceps holder 12 as to slide back andforth therethrough and is connected to the end of wire 22. A pair oflink members 19 and 20 are pivoted on the tip of connector 18 at one endand on respective blades 15 and 16 at the other end. Consequently, apair of scissors 17 are opened and closed as wire 22 is moved throughflexible tube 11.

Either said blade 15 or 16 blade 16 in FIGS. 2 and 3 has a clamp member23 having an L-shaped section and protruding from the back of the blade.In this clamp member 23 there is perforated a window 24, which helpsprevent any damage to the clamped cellular tissue that would otherwisebe inevitable.

The forceps assembly according to the present invention is manipulatedin the following manner to, for'example, remove a polyp 26 asillustrated in FIGS. 2 and 3 from the body wall 25.

First, the forceps assembly is inserted into the body cavity until itspair of scissors 17 come into contact with the polyp 26 to be cut andremoved. Secondly,.the pair of scissors 17 are swung open by the push ofwire 12 and blades 15 and 16 are so moved as to sandwich the neck ofpolyp 36. Thirdly, the pair of scissors 17 are closed to cut the neck ofpolyp 26, which is simultaneously clamped and held steady between blade15 and clamp member 23. Finally the, forceps assembly is withdrawn fromthe body cavity with polyp 26 clamped steady between blade 15 and clampmember 23.

By virtue of the clamp member 23 attached to one of the blades 15 and16, polyp 26 is held so firmly by the pair of scissors 17 that it neverslips out of the pair of scissors 17 while it is being extracted fromthe body cavity. Thus, the forceps assembly according to this inventioncan remove without fail pieces of cellular tissue from the bodycavities.

The embodiment of this invention described above is provided with asingle clamp member with a window on one of the scissor blades. Ifpreferable or necessary, each scissor'blade is provided with a clampmember, which may or may not have a window.

What is claimed is:

l. A forceps assembly attached to one end of a flexible tube with a wirerunning therethrough for removing cellular tissue from body cavities,comprising:

a forceps holder attached to the end of said flexible tube;

a pair of scissors held by said forceps holder, having a pair of cuttingblades which are opened and closed respectively by push and pull of saidwire, said blades having respective inner surfaces cooperating to serveas said scissors, and respective outer surfaces; and

means for clamping severed cellular tissue including at least one clampmember protruding from the back of one of said blades, said clamp memberbeing cantilevered and extending in a direction toward the other of saidblades and adjacent the outer surface of said other blade andcooperating with the outer surface of said other blade so as to clamp apiece of cellular tissue cut by said pair of scissors between saidcantilevered clamp member and the outer surface of said other blade.

2. A forceps assembly according to claim 1 wherein said clamp member hasa window therein for lessening the pressure exerted on the clamped pieceof cellular tissue.

3. A forceps assembly according to claim 1 comprising a pair of linkmembers respectively pivotally connected to said pair of blades, saidlink members being coupled to said wire for respectively opening andclosing said blades by push and pull of said wire.

4. A forceps assembly according to claim 1 comprising at least onesupport plate fixedly connected to said forceps holder, said scissorblades being pivotally con nected to said at least one support plate;and a pair of link members respectively coupled to said pair of scissorblades, said link members being pivotally coupled to said wire.

3,840,003 I 3 4 5. A forceps assembly according to claim 1 wherein thecombination of said at least one clamp member and said at least oneclamp member has a generally L- said one of said blades has a portionhaving a generally shaped cross-section. U-shaped cross-section.

6. A forceps assembly according to claim 1 wherein

1. A forceps assembly attached to one end of a flexible tube with a wirerunning therethrough for removing cellular tissue from body cavities,comprising: a forceps holder attached to the end of said flexible tube;a pair of scissors held by said forceps holder, having a pair of cuttingblades which are opened and closed respectively by push and pull of saidwire, said blades having respective inner surfaces cooperating to serveas said scissors, and respective outer surfaces; and means for clampingsevered cellular tissue including at least one clamp member protrudingfrom the back of one of said blades, said clamp member beingcantilevered and extending in a direction toward the other of saidblades and adjacent the outer surface of said other blade andcooperating with the outer surface of said other blade so as to clamp apiece of cellular tissue cut by said pair of scissors between saidcantilevered clamp member and the outer surface of said other blade. 2.A forceps assembly according to claim 1 wherein said clamp member has awindow therein for lessening the pressure exerted on the clamped pieceof cellular tissue.
 3. A forceps assembly according to claim 1comprising a pair of link members respectively pivotally connected tosaid pair of blades, said link members being coupled to said wire forrespectively opening and closing said blades by push and pull of saidwire.
 4. A forceps assembly according to claim 1 comprising at least onesupport plate fixedly connected to said forceps holder, said scissorblades being pivotally connected to said at least one support plate; anda pair of link members respectively coupled to said pair of scissorblades, said link members being pivotally coupled to said wire.
 5. Aforceps assembly according to claim 1 wherein said at least one clampmember has a generally L-shaped cross-section.
 6. A forceps assemblyaccording to claim 1 wherein the combination of said at least one clampmember and said one of said blades has a portion having a generallyU-shaped cross-section.